A vehicle networking-based electric vehicle and charging station coordination control method

Abstract

The application provides a kind of electric vehicle and charging station coordination control method based on Internet of Vehicles, which includes the following steps: a, control system initialization;B, judge the number y of idle piles in charging station, if y≠0, continue to monitor idle charging pile in station, otherwise enter step c;C, judge whether there is a car reservation to enter this charging station to charge, if there is no any reservation information, return to step b, otherwise enter step d;D, judge whether the reservation car has entered this charging station, if the reservation car has entered this charging station, enter step e, otherwise return to step b;E, if there is a car battery soc>K, the car in charging pile stops service, enter step f;Otherwise, the reservation car waits until the battery soc value of a car in charging pile reaches K first, then the car in charging pile stops charging service, enter step f;F, the reservation car enters the charging pile to charge;G, the next charging station is reserved for the car stopped service, return to step b.

Description

Technical Field

[0001] This invention belongs to the field of electric vehicles, and particularly relates to a coordinated control method for electric vehicles and charging stations based on vehicle-to-everything (V2X) communication. Background Technology

[0002] With the popularization of electric vehicles, the low operation cost and high-performance characteristics of electric vehicles bring users a better driving experience. However, existing electric vehicles are constrained by battery capacity and charging time, which brings great inconvenience to drivers who drive electric vehicles for long-distance travel. Therefore, drivers of electric vehicles must plan various charging stations along the driving route in advance to continuously charge their vehicles. However, during holidays, the number of electric vehicles for travel reaches a peak, and the number of charging piles at each charging station along the driving route is insufficient to provide charging services for all electric vehicles, resulting in queuing for charging at each charging station, which brings great inconvenience to users on long-distance trips. To solve this problem, some charging control methods are disclosed in the prior art. For example, the number of idle charging piles or the number of queued vehicles at each charging station, and the estimated queuing time are pushed to vehicle owners through the Internet of Vehicles, so that vehicle owners can re-plan a new driving route; for example, based on the remaining power of the vehicle, vehicle owners can select and lock corresponding idle charging piles according to the pushed number of idle charging piles at each charging station to prevent occupation by other users; for example, a charging model is optimized through a machine algorithm, electric vehicles are charged according to a charging allocation strategy, and the queuing time is obtained through probability calculation of incoming vehicles at each charging station, which is convenient for vehicle owners to select the charging station with the shortest queuing time, so as to reduce the queuing waiting time of vehicle owners. Although the above disclosed charging control methods alleviate vehicle owners' charging anxiety to a certain extent, they do not conform to the actual charging situation of electric vehicles. The existing charging process of electric vehicles does not continue to charge at a constant power, but adjusts the charging power in stages along with the change of the soc value. For example, when an electric vehicle is connected to a charging pile for charging, when soc ≤ 50%, the charging power is at the peak; when 50% < soc ≤ 80%, the charging power drops to 40% of the peak; when soc > 80%, the charging power drops to 10% of the peak, and enters the trickle charging process to protect the battery and prolong its service life. According to the above-mentioned hierarchical adjustment method for charging power, the charging power is at the peak when the battery is charged to soc = 50%, the charging speed is the fastest, and the required charging time is the shortest when the soc increases by the same value. If queuing for charging is required at the charging station, ending the charging when the electric vehicle is charged to soc = 50% can significantly reduce the waiting time of drivers of subsequent vehicles waiting in queue. Calculated based on the average full-electric driving range of existing electric vehicles of 400KM, a vehicle charged to 50% soc can travel at least 150KM, and the distance between adjacent charging stations on national roads or expressways is far less than 100KM. Therefore, even if the vehicle is charged to 50% soc, it can still ensure that it can reach the next charging station safely. The charging control methods disclosed in the prior art do not involve the factor of hierarchical adjustment of electric vehicle charging power, which will significantly increase the charging queuing waiting time of charging stations during peak travel periods, and also reduce the utilization efficiency of each charging pile.Allowing drivers to wait until their cars are fully charged before ending the charging service would result in excessively long charging wait times, severely impacting the utilization efficiency of charging stations, causing vehicle queues and congestion at charging stations, and even leading to disputes among drivers vying for charging stations.

[0003] In addition, the existing technology that uses probability calculations based on the number of vehicles entering each charging station to predict the number of cars entering the charging station and the waiting time is difficult to draw accurate conclusions. If a car that is expected to enter the charging station does not actually enter the charging station, or a car that is not expected to enter the charging station does enter the charging station, it will cause chaos in the charging allocation strategy. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the aforementioned technical problems, the purpose of this invention is to provide a coordinated control method for electric vehicles and charging stations based on the Internet of Vehicles, which can reduce charging queue waiting time and improve the utilization efficiency of charging piles during peak electric vehicle travel periods.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0008] This invention provides a coordinated control method for electric vehicles and charging stations based on the Internet of Vehicles (IoV), which includes the following steps:

[0009] a. Control system initialization;

[0010] b. Determine the number of available charging piles y in the charging station. If y≠0, continue monitoring available charging piles in the station; otherwise, proceed to step c.

[0011] c. Determine if any car has made a reservation to enter this charging station. If there is no reservation information, return to step b; otherwise, proceed to step d.

[0012] d. Determine whether the reserved vehicle has entered the charging station. If the reserved vehicle has entered the charging station, proceed to step e; otherwise, return to step b.

[0013] e. Analyze the SOC values ​​of the batteries of each car at the charging station and compare them with the set value K. If the SOC of a car battery is greater than K, then the service at that charging station is stopped and proceed to step f; otherwise, the car is reserved to wait until the SOC value of a car battery at a charging station reaches K first, then the charging service at that charging station is stopped and proceed to step f.

[0014] f. Notify drivers of vehicles whose services have been suspended to leave the charging station and allow reserved vehicles to enter the charging station for charging.

[0015] g. Based on the average energy consumption Q per 100 kilometers of the car that was previously out of service, estimate the farthest charging station that the remaining battery power can reach, reserve the charging station for the car, and return to step b.

[0016] The electric vehicle and charging station coordinated control method based on vehicle-to-everything (V2X) of the present invention inserts step h between steps c and d above:

[0017] h. Based on the average energy consumption W per 100 kilometers of the reserved vehicle, determine whether it can reach the next charging station without charging at this charging station. If the determination is yes, refuse the reserved vehicle to enter this charging station and inform its driver, then return to step b; if the determination is no, proceed to step d.

[0018] The vehicle network includes a user terminal installed in each electric vehicle and a control terminal installed in each charging station. The user terminal and the control terminal, as well as the control terminals themselves, transmit information bidirectionally via wireless signals. Each control terminal communicates with each charging pile in its respective charging station.

[0019] (III) Beneficial Effects

[0020] This invention provides a coordinated control method for electric vehicles and charging stations based on the Internet of Vehicles (IoV). It has the following beneficial effects:

[0021] 1. When there are no available charging piles at a charging station, priority is given to charging electric vehicles whose SOC exceeds or reaches the peak power charging SOC limit K. After these electric vehicles finish charging, their charging piles are made available for electric vehicles that have made reservations to enter the station. This can both utilize the initial peak power charging phase of each electric vehicle to speed up the charging process, reduce the waiting time of waiting vehicles, and improve the utilization efficiency of each charging pile; it can also reserve the next charging station for electric vehicles that have stopped serving, achieving seamless handover between corresponding charging stations along the driving route of electric vehicles and preventing range anxiety for drivers of electric vehicles that have stopped serving.

[0022] 2. When there are no available charging stations, electric vehicles that have made reservations but can still drive to the next charging station will be refused entry, thereby reducing the number of vehicles queuing to enter the charging station. This will enable emergency services for electric vehicles that urgently need charging and improve the service quality of the charging station.

[0023] 3. By utilizing the user terminal in each electric vehicle and the control terminal in each charging station, real-time two-way information transmission between electric vehicles and charging stations can be realized, facilitating drivers' charging reservations and the management of reserved vehicles; through communication between the control terminal in the charging station and each charging pile, the control terminal can monitor the working status of each charging pile, facilitating flexible allocation of each charging pile. Attached Figure Description

[0024] Figure 1This is a schematic diagram of the coordinated control method between electric vehicles and charging stations according to Embodiment 1 of the present invention;

[0025] Figure 2 This is a schematic diagram of the coordinated control method between electric vehicles and charging stations according to Embodiment 2 of the present invention;

[0026] Figure 3 This is a schematic diagram of the vehicle network structure of the present invention.

[0027] In the diagram: 1. Charging station; 2. Charging pile; 3. Control terminal; 4. User terminal; 5. Road.

[0028] In this invention, "charging pile in use" means "a charging pile with an electric vehicle connected to it", and "idle pile" means "a charging pile without an electric vehicle connected to it". Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example 1

[0031] The charging strategies (i.e., charging power tiered adjustment methods) for various electric vehicles and charging piles are stored in chips within the electric vehicle and charging pile at the factory. These strategies are limited by factors such as battery capacity, quality, AC / DC conversion chip performance, and the circuit's maximum allowable voltage and current, and are preset by each manufacturer. When an electric vehicle connects to a charging pile, the preset charging strategies are matched, and the optimal strategy suitable for both is automatically selected for charging. Therefore, when different electric vehicles are matched with charging piles, the battery SOC value required to maintain peak charging power will differ. Assuming the battery SOC value required to maintain peak charging power is K, the value of K will vary depending on the electric vehicle and charging pile being matched. Generally, manufacturers set a value for K in each charging strategy. Therefore, when an electric vehicle connects to a charging pile, the value of K is automatically obtained after the charging strategy matching, and the control terminal can obtain the value of K during the charging process through communication with the charging pile.

[0032] like Figure 3As shown, the vehicle network of the present invention includes a control system consisting of a user terminal 4 installed in the electric vehicle and a control terminal 3 installed in the charging station. The user terminal and the control terminal, the control terminal and the control terminal, and the user terminal and the user terminal communicate bidirectionally via wireless signals. The user terminal can receive instructions from the driver and send them to the control terminal or other user terminals. For example, the driver can reserve a charging station through the user terminal, and this reservation information will be transmitted to the control terminal of the reserved charging station. Each control terminal communicates with each charging pile in its respective charging station to monitor the idle status of each charging pile or various parameters during charging in real time.

[0033] like Figure 1 As shown, the coordinated control method for electric vehicles and charging stations based on the Internet of Vehicles of the present invention includes the following steps:

[0034] (1) Control system initialization;

[0035] (2) The control terminal of the charging station monitors the number of idle piles y in the station. If y≠0, the monitoring of idle piles in the station continues; otherwise, proceed to step (3).

[0036] (3) The control terminal determines whether there is a car reservation to enter the charging station for charging based on the information it receives. If there is no reservation information, it returns to step (2); otherwise, it proceeds to step (4).

[0037] (4) The control terminal communicates with the user terminal of the reserved car to obtain the location information of the reserved car and determine whether the reserved car has entered the charging station. If the reserved car has entered the charging station, proceed to step (5); otherwise, return to step (2).

[0038] (5) The control terminal monitors the soc value of each car battery at the charging pile. If the soc value of a car battery is greater than K, the charging pile stops the service and proceeds to step (6). Otherwise, the reserved car waits in the queue until the soc value of a car battery at a charging pile reaches K first. Then the charging pile stops the charging service and proceeds to step (6).

[0039] (6) Notify the drivers of the cars whose services have been suspended to drive their cars away from the charging station, and the cars that have made reservations to enter the charging pile for charging in the order of their queue.

[0040] (7) Based on the average power consumption Q per 100 kilometers of the vehicle before the service was suspended, estimate the farthest charging station that the remaining power can reach, reserve the charging station for it, and the control terminal of this charging station will transmit the reservation information to the reserved charging station and return to step (2).

[0041] Example 2

[0042] like Figure 2As shown, the coordinated control method for electric vehicles and charging stations based on the Internet of Vehicles in this embodiment includes the following steps:

[0043] (1) Control system initialization;

[0044] (2) The control terminal of the charging station monitors the number of idle piles y in the station. If y≠0, the monitoring of idle piles in the station continues; otherwise, proceed to step (3).

[0045] (3) The control terminal determines whether there is a car reservation to enter the charging station for charging based on the information it receives. If there is no reservation information, it returns to step (2); otherwise, it proceeds to step (4).

[0046] (4) Analyze the reserved car and determine whether it can reach the next charging station without charging at this station based on the average power consumption W per 100 kilometers of the reserved car. If the judgment is yes, refuse the reserved car to enter this charging station and wirelessly send the information to the user terminal of the reserved car to inform its driver, and return to step (2); if the judgment is no, proceed to step (5).

[0047] (5) The control terminal communicates with the user terminal of the reserved car to obtain the location information of the reserved car and determine whether the reserved car has entered the charging station. If the reserved car has entered the charging station, proceed to step (6); otherwise, return to step (2).

[0048] (6) The control terminal monitors the soc value of each car battery at the charging pile. If the soc value of a car battery is greater than K, the charging pile stops the service and proceeds to step (7); otherwise, the reserved car waits in the queue until the soc value of a car battery at a charging pile reaches K first, then the charging pile stops the charging service and proceeds to step (7).

[0049] (7) Notify the drivers of the cars whose services have been suspended to drive their cars away from the charging station, and the cars that have made reservations to enter the charging pile for charging in the order of their queue.

[0050] (8) Based on the average power consumption Q per 100 kilometers of the vehicle before the service was suspended, estimate the farthest charging station that the remaining power can reach, reserve the charging station for it, and the control terminal of this charging station will transmit the reservation information to the reserved charging station and return to step (2).

[0051] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A coordinated control method for electric vehicles and charging stations based on vehicle-to-everything (V2X) communication, characterized in that... Includes the following steps: a. Control system initialization; b. Determine the number of available charging piles y in the charging station. If y≠0, continue monitoring available charging piles in the station; otherwise, proceed to step c. c. Determine if any car has made a reservation to enter this charging station. If there is no reservation information, return to step b; otherwise, proceed to step d. d. Determine whether the reserved vehicle has entered the charging station. If the reserved vehicle has entered the charging station, proceed to step e; otherwise, return to step b. e. Analyze the SOC values ​​of the batteries of each car at the charging station and compare them with the set value K. If the SOC of a car battery is greater than K, then the service at that charging station is stopped and proceed to step f; otherwise, the car is reserved to wait until the SOC value of a car battery at a charging station reaches K first, then the charging service at that charging station is stopped and proceed to step f. f. Notify drivers of vehicles whose services have been suspended to leave the charging station and allow reserved vehicles to enter the charging station for charging. g. Based on the average power consumption Q per 100 kilometers of the car that was previously out of service, estimate the farthest charging station that the remaining power can reach, reserve the charging station for the car, and return to step b. Insert step h between step c and step d: h. Based on the average energy consumption W per 100 kilometers of the reserved vehicle, determine whether it can reach the next charging station without charging at this charging station. If the determination is yes, refuse the reserved vehicle to enter this charging station and inform its driver, then return to step b; if the determination is no, proceed to step d.

2. The method for coordinated control of electric vehicles and charging stations based on vehicle-to-everything (V2X) as described in claim 1, characterized in that: The vehicle network includes a user terminal installed in each electric vehicle and a control terminal installed in each charging station. The user terminal and the control terminal, as well as the control terminals themselves, transmit information bidirectionally via wireless signals. Each control terminal communicates with each charging pile in its respective charging station.

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